Adjustable Desk Riser

FIG. 1 is an upper right front perspective view of an adjustable desk riser. FIG. 2 is an upper right rear perspective view thereof. FIG. 3 is a lower right front perspective view thereof. FIG. 4 is a lower right rear perspective view thereof. FIG. 5 is a lower left rear perspective view thereof. FIG. 6 is a front elevational view thereof. FIG. 7 is a rear elevational view thereof. FIG. 8 is a left elevational view thereof. FIG. 9 is a right elevational view thereof. FIG. 10 is a top plan view thereof; and, FIG. 11 is a bottom plan view thereof. In the drawings, broken lines illustrate features that form no part of the claimed design.